/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-d623d84
[2020-07-20 13:34:47,567 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 13:34:47,575 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 13:34:47,605 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 13:34:47,606 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 13:34:47,609 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 13:34:47,613 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 13:34:47,628 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-07-20 13:34:47,634 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-07-20 13:34:47,641 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 13:34:47,642 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 13:34:47,647 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 13:34:47,652 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 13:34:47,654 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 13:34:47,656 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 13:34:47,659 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 13:34:47,664 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 13:34:47,673 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 13:34:47,681 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 13:34:47,687 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 13:34:47,689 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 13:34:47,690 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 13:34:47,697 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 13:34:47,697 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 13:34:47,698 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 13:34:47,699 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 13:34:47,700 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 13:34:47,701 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 13:34:47,701 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 13:34:47,702 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 13:34:47,703 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 13:34:47,704 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 13:34:47,706 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 13:34:47,706 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 13:34:47,707 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 13:34:47,709 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 13:34:47,711 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 13:34:47,729 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 13:34:47,730 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 13:34:47,731 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 13:34:47,732 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 13:34:47,732 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 13:34:47,733 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 13:34:47,733 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 13:34:47,733 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 13:34:47,733 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 13:34:47,733 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 13:34:47,734 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 13:34:47,734 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 13:34:47,734 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 13:34:47,734 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 13:34:47,735 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 13:34:47,735 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 13:34:47,735 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 13:34:47,735 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 13:34:47,736 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 13:34:47,736 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 13:34:47,736 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 13:34:47,736 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:34:47,737 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 13:34:47,737 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 13:34:47,737 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 13:34:47,737 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 13:34:47,738 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:47,738 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 13:34:47,738 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 13:34:47,738 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 13:34:48,179 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 13:34:48,198 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 13:34:48,203 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 13:34:48,206 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 13:34:48,206 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 13:34:48,207 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c
[2020-07-20 13:34:48,290 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054707487/fd946cbba4994fec94da94494f95544f/FLAG71ed0f227
[2020-07-20 13:34:48,974 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 13:34:48,974 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c
[2020-07-20 13:34:48,986 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054707487/fd946cbba4994fec94da94494f95544f/FLAG71ed0f227
[2020-07-20 13:34:49,233 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/054707487/fd946cbba4994fec94da94494f95544f
[2020-07-20 13:34:49,257 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 13:34:49,263 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 13:34:49,270 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 13:34:49,271 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 13:34:49,278 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 13:34:49,281 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,288 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1aa79a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49, skipping insertion in model container
[2020-07-20 13:34:49,289 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,307 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 13:34:49,344 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 13:34:49,623 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:34:49,633 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 13:34:49,654 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:34:49,673 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 13:34:49,674 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49 WrapperNode
[2020-07-20 13:34:49,675 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 13:34:49,676 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 13:34:49,677 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 13:34:49,677 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 13:34:49,700 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,701 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,710 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,711 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,849 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,852 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,857 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
[2020-07-20 13:34:49,861 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 13:34:49,862 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 13:34:49,862 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 13:34:49,863 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 13:34:49,868 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:34:49,964 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 13:34:49,964 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 13:34:49,964 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo1
[2020-07-20 13:34:49,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2
[2020-07-20 13:34:49,965 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 13:34:49,965 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 13:34:49,965 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 13:34:49,965 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo1
[2020-07-20 13:34:49,967 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2
[2020-07-20 13:34:49,968 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 13:34:49,969 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 13:34:49,969 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 13:34:50,252 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 13:34:50,253 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 13:34:50,259 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:50 BoogieIcfgContainer
[2020-07-20 13:34:50,260 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 13:34:50,262 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 13:34:50,263 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 13:34:50,268 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 13:34:50,269 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:34:49" (1/3) ...
[2020-07-20 13:34:50,270 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382c296a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:50, skipping insertion in model container
[2020-07-20 13:34:50,271 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:34:49" (2/3) ...
[2020-07-20 13:34:50,272 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@382c296a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:34:50, skipping insertion in model container
[2020-07-20 13:34:50,272 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:34:50" (3/3) ...
[2020-07-20 13:34:50,279 INFO  L109   eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c
[2020-07-20 13:34:50,296 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 13:34:50,311 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 13:34:50,346 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 13:34:50,396 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 13:34:50,396 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 13:34:50,396 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 13:34:50,396 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 13:34:50,397 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 13:34:50,397 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 13:34:50,397 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 13:34:50,397 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 13:34:50,455 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states.
[2020-07-20 13:34:50,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-07-20 13:34:50,478 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:50,480 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:50,481 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:50,491 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:50,492 INFO  L82        PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times
[2020-07-20 13:34:50,508 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:50,509 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892532422]
[2020-07-20 13:34:50,510 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:50,617 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:50,617 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:50,622 INFO  L263         TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 13:34:50,629 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:50,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:34:50,744 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:34:50,746 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892532422]
[2020-07-20 13:34:50,748 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:34:50,749 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 13:34:50,750 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682618216]
[2020-07-20 13:34:50,759 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 13:34:50,760 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:50,778 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 13:34:50,779 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 13:34:50,783 INFO  L87              Difference]: Start difference. First operand 33 states. Second operand 5 states.
[2020-07-20 13:34:50,954 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:50,955 INFO  L93              Difference]: Finished difference Result 44 states and 53 transitions.
[2020-07-20 13:34:50,957 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 13:34:50,960 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-07-20 13:34:50,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:50,982 INFO  L225             Difference]: With dead ends: 44
[2020-07-20 13:34:50,982 INFO  L226             Difference]: Without dead ends: 30
[2020-07-20 13:34:50,988 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 13:34:51,017 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-07-20 13:34:51,057 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-07-20 13:34:51,060 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-07-20 13:34:51,063 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-07-20 13:34:51,066 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13
[2020-07-20 13:34:51,066 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:51,067 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-07-20 13:34:51,067 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 13:34:51,067 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-07-20 13:34:51,070 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-20 13:34:51,071 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:51,071 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:51,286 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:51,287 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:51,288 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:51,289 INFO  L82        PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times
[2020-07-20 13:34:51,289 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:51,290 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702525288]
[2020-07-20 13:34:51,290 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:51,360 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:51,361 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:51,363 INFO  L263         TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 13:34:51,365 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:51,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 13:34:51,440 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:34:51,441 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702525288]
[2020-07-20 13:34:51,441 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:34:51,441 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 13:34:51,442 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160295908]
[2020-07-20 13:34:51,445 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 13:34:51,446 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:51,446 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 13:34:51,447 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 13:34:51,447 INFO  L87              Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states.
[2020-07-20 13:34:51,566 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:51,567 INFO  L93              Difference]: Finished difference Result 36 states and 44 transitions.
[2020-07-20 13:34:51,568 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 13:34:51,569 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2020-07-20 13:34:51,569 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:51,571 INFO  L225             Difference]: With dead ends: 36
[2020-07-20 13:34:51,572 INFO  L226             Difference]: Without dead ends: 32
[2020-07-20 13:34:51,574 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 13:34:51,575 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2020-07-20 13:34:51,584 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30.
[2020-07-20 13:34:51,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-07-20 13:34:51,587 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-07-20 13:34:51,587 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14
[2020-07-20 13:34:51,588 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:51,588 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-07-20 13:34:51,588 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 13:34:51,589 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-07-20 13:34:51,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-07-20 13:34:51,591 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:51,591 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:51,807 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:51,808 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:51,809 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:51,809 INFO  L82        PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times
[2020-07-20 13:34:51,810 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:51,811 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96446262]
[2020-07-20 13:34:51,811 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:51,851 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:51,852 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:51,853 INFO  L263         TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-07-20 13:34:51,856 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:51,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 13:34:51,936 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:52,168 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:52,174 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:52,262 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 13:34:52,263 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96446262]
[2020-07-20 13:34:52,263 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:52,264 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10
[2020-07-20 13:34:52,264 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350095625]
[2020-07-20 13:34:52,265 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-20 13:34:52,265 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:52,265 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-20 13:34:52,266 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2020-07-20 13:34:52,266 INFO  L87              Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states.
[2020-07-20 13:34:52,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:52,445 INFO  L93              Difference]: Finished difference Result 41 states and 52 transitions.
[2020-07-20 13:34:52,445 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 13:34:52,446 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 26
[2020-07-20 13:34:52,446 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:52,449 INFO  L225             Difference]: With dead ends: 41
[2020-07-20 13:34:52,449 INFO  L226             Difference]: Without dead ends: 37
[2020-07-20 13:34:52,451 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:34:52,451 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-07-20 13:34:52,460 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35.
[2020-07-20 13:34:52,461 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2020-07-20 13:34:52,463 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions.
[2020-07-20 13:34:52,464 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26
[2020-07-20 13:34:52,464 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:52,464 INFO  L479      AbstractCegarLoop]: Abstraction has 35 states and 45 transitions.
[2020-07-20 13:34:52,464 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-20 13:34:52,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions.
[2020-07-20 13:34:52,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-20 13:34:52,467 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:52,468 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:52,683 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:52,684 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:52,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:52,685 INFO  L82        PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times
[2020-07-20 13:34:52,686 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:52,687 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226416286]
[2020-07-20 13:34:52,687 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:52,724 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:52,725 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:52,726 INFO  L263         TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-07-20 13:34:52,729 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:52,793 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 13:34:52,794 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:53,015 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:53,021 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:53,103 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 13:34:53,104 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226416286]
[2020-07-20 13:34:53,104 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:53,105 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10
[2020-07-20 13:34:53,106 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541086800]
[2020-07-20 13:34:53,107 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-20 13:34:53,108 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:53,109 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-20 13:34:53,110 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2020-07-20 13:34:53,110 INFO  L87              Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states.
[2020-07-20 13:34:53,334 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:53,335 INFO  L93              Difference]: Finished difference Result 46 states and 62 transitions.
[2020-07-20 13:34:53,336 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 13:34:53,336 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 27
[2020-07-20 13:34:53,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:53,341 INFO  L225             Difference]: With dead ends: 46
[2020-07-20 13:34:53,346 INFO  L226             Difference]: Without dead ends: 42
[2020-07-20 13:34:53,348 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:34:53,349 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-07-20 13:34:53,369 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35.
[2020-07-20 13:34:53,370 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2020-07-20 13:34:53,377 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions.
[2020-07-20 13:34:53,379 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27
[2020-07-20 13:34:53,380 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:53,381 INFO  L479      AbstractCegarLoop]: Abstraction has 35 states and 45 transitions.
[2020-07-20 13:34:53,381 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-20 13:34:53,386 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions.
[2020-07-20 13:34:53,390 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2020-07-20 13:34:53,391 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:53,392 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:53,606 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:53,607 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:53,608 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:53,608 INFO  L82        PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times
[2020-07-20 13:34:53,608 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:53,609 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115176546]
[2020-07-20 13:34:53,609 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:53,652 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:53,652 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:53,654 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 13:34:53,657 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:53,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-07-20 13:34:53,772 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:54,096 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:54,212 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:54,214 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:54,272 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 13:34:54,273 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115176546]
[2020-07-20 13:34:54,274 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:54,274 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12
[2020-07-20 13:34:54,274 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928207769]
[2020-07-20 13:34:54,275 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 13:34:54,276 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:54,276 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 13:34:54,277 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:34:54,277 INFO  L87              Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states.
[2020-07-20 13:34:54,483 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:54,484 INFO  L93              Difference]: Finished difference Result 51 states and 72 transitions.
[2020-07-20 13:34:54,484 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 13:34:54,484 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 39
[2020-07-20 13:34:54,485 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:54,487 INFO  L225             Difference]: With dead ends: 51
[2020-07-20 13:34:54,487 INFO  L226             Difference]: Without dead ends: 47
[2020-07-20 13:34:54,488 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:34:54,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2020-07-20 13:34:54,502 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40.
[2020-07-20 13:34:54,503 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-07-20 13:34:54,505 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions.
[2020-07-20 13:34:54,505 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39
[2020-07-20 13:34:54,506 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:54,506 INFO  L479      AbstractCegarLoop]: Abstraction has 40 states and 54 transitions.
[2020-07-20 13:34:54,508 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 13:34:54,508 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions.
[2020-07-20 13:34:54,511 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-07-20 13:34:54,512 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:54,512 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:54,723 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:54,724 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:54,724 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:54,724 INFO  L82        PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times
[2020-07-20 13:34:54,725 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:54,726 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252171162]
[2020-07-20 13:34:54,726 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:54,775 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:54,775 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:54,777 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 13:34:54,779 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:54,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-20 13:34:54,830 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:55,081 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:55,146 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:55,147 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:55,192 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 13:34:55,193 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252171162]
[2020-07-20 13:34:55,193 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:55,193 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12
[2020-07-20 13:34:55,194 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068644119]
[2020-07-20 13:34:55,194 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 13:34:55,195 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:55,195 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 13:34:55,195 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:34:55,195 INFO  L87              Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states.
[2020-07-20 13:34:55,372 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:55,372 INFO  L93              Difference]: Finished difference Result 56 states and 84 transitions.
[2020-07-20 13:34:55,373 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 13:34:55,373 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 40
[2020-07-20 13:34:55,374 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:55,375 INFO  L225             Difference]: With dead ends: 56
[2020-07-20 13:34:55,376 INFO  L226             Difference]: Without dead ends: 52
[2020-07-20 13:34:55,377 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:34:55,377 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-07-20 13:34:55,387 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40.
[2020-07-20 13:34:55,387 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-07-20 13:34:55,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions.
[2020-07-20 13:34:55,389 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40
[2020-07-20 13:34:55,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:55,390 INFO  L479      AbstractCegarLoop]: Abstraction has 40 states and 54 transitions.
[2020-07-20 13:34:55,390 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 13:34:55,390 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions.
[2020-07-20 13:34:55,392 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-07-20 13:34:55,393 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:55,393 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:55,608 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:55,609 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:55,610 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:55,610 INFO  L82        PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times
[2020-07-20 13:34:55,610 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:55,610 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287526274]
[2020-07-20 13:34:55,610 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:55,648 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:55,648 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:55,649 INFO  L263         TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:34:55,662 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:55,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-07-20 13:34:55,723 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:56,107 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:56,108 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:56,210 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:56,268 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:56,320 INFO  L134       CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-07-20 13:34:56,320 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287526274]
[2020-07-20 13:34:56,321 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:56,321 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14
[2020-07-20 13:34:56,321 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212114340]
[2020-07-20 13:34:56,322 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-07-20 13:34:56,322 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:56,323 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-07-20 13:34:56,323 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-07-20 13:34:56,323 INFO  L87              Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states.
[2020-07-20 13:34:56,544 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:56,545 INFO  L93              Difference]: Finished difference Result 61 states and 96 transitions.
[2020-07-20 13:34:56,545 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:34:56,546 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 52
[2020-07-20 13:34:56,546 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:56,551 INFO  L225             Difference]: With dead ends: 61
[2020-07-20 13:34:56,551 INFO  L226             Difference]: Without dead ends: 57
[2020-07-20 13:34:56,553 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2020-07-20 13:34:56,554 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-07-20 13:34:56,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45.
[2020-07-20 13:34:56,594 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-07-20 13:34:56,595 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions.
[2020-07-20 13:34:56,595 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52
[2020-07-20 13:34:56,596 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:56,596 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 64 transitions.
[2020-07-20 13:34:56,596 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-07-20 13:34:56,596 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions.
[2020-07-20 13:34:56,598 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2020-07-20 13:34:56,598 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:56,598 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:56,811 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:56,813 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:56,813 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:56,814 INFO  L82        PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times
[2020-07-20 13:34:56,814 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:56,815 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383989220]
[2020-07-20 13:34:56,815 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:56,878 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:56,878 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:56,879 INFO  L263         TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:34:56,884 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:56,954 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2020-07-20 13:34:56,954 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:57,318 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:57,319 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:57,414 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:57,418 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:57,475 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:57,523 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-07-20 13:34:57,524 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383989220]
[2020-07-20 13:34:57,524 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:57,525 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14
[2020-07-20 13:34:57,525 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682330572]
[2020-07-20 13:34:57,526 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-07-20 13:34:57,527 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:57,527 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-07-20 13:34:57,527 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-07-20 13:34:57,528 INFO  L87              Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states.
[2020-07-20 13:34:57,747 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:57,748 INFO  L93              Difference]: Finished difference Result 66 states and 110 transitions.
[2020-07-20 13:34:57,748 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:34:57,748 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 54
[2020-07-20 13:34:57,749 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:57,751 INFO  L225             Difference]: With dead ends: 66
[2020-07-20 13:34:57,752 INFO  L226             Difference]: Without dead ends: 62
[2020-07-20 13:34:57,753 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2020-07-20 13:34:57,753 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2020-07-20 13:34:57,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45.
[2020-07-20 13:34:57,764 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-07-20 13:34:57,765 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions.
[2020-07-20 13:34:57,766 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54
[2020-07-20 13:34:57,766 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:57,766 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 64 transitions.
[2020-07-20 13:34:57,767 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-07-20 13:34:57,767 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions.
[2020-07-20 13:34:57,768 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 79
[2020-07-20 13:34:57,768 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:57,769 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:57,984 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:57,986 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:57,986 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:57,987 INFO  L82        PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times
[2020-07-20 13:34:57,987 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:57,988 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867860441]
[2020-07-20 13:34:57,989 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:58,055 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:58,055 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:58,057 INFO  L263         TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:34:58,061 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:58,169 INFO  L134       CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked.
[2020-07-20 13:34:58,170 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:34:58,780 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:58,782 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:58,930 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:59,023 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:59,025 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:59,075 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:59,076 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:34:59,124 INFO  L134       CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2020-07-20 13:34:59,125 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867860441]
[2020-07-20 13:34:59,125 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:34:59,125 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16
[2020-07-20 13:34:59,126 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380169843]
[2020-07-20 13:34:59,126 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-07-20 13:34:59,126 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:34:59,127 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-07-20 13:34:59,127 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240
[2020-07-20 13:34:59,127 INFO  L87              Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states.
[2020-07-20 13:34:59,411 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:34:59,412 INFO  L93              Difference]: Finished difference Result 71 states and 124 transitions.
[2020-07-20 13:34:59,412 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:34:59,413 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 78
[2020-07-20 13:34:59,414 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:34:59,415 INFO  L225             Difference]: With dead ends: 71
[2020-07-20 13:34:59,416 INFO  L226             Difference]: Without dead ends: 67
[2020-07-20 13:34:59,417 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420
[2020-07-20 13:34:59,417 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2020-07-20 13:34:59,429 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50.
[2020-07-20 13:34:59,430 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-07-20 13:34:59,431 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions.
[2020-07-20 13:34:59,431 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78
[2020-07-20 13:34:59,432 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:34:59,432 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 75 transitions.
[2020-07-20 13:34:59,432 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-07-20 13:34:59,432 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions.
[2020-07-20 13:34:59,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 109
[2020-07-20 13:34:59,434 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:34:59,434 INFO  L422         BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:34:59,649 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:59,650 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:34:59,650 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:34:59,650 INFO  L82        PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times
[2020-07-20 13:34:59,651 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:34:59,651 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462350868]
[2020-07-20 13:34:59,652 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:34:59,722 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:34:59,722 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:34:59,724 INFO  L263         TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:34:59,728 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:34:59,836 INFO  L134       CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked.
[2020-07-20 13:34:59,836 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:00,488 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:00,669 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:00,763 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:00,813 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:00,867 INFO  L134       CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked.
[2020-07-20 13:35:00,868 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462350868]
[2020-07-20 13:35:00,868 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:00,868 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15
[2020-07-20 13:35:00,869 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868144482]
[2020-07-20 13:35:00,871 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 13:35:00,871 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:00,871 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 13:35:00,872 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:35:00,872 INFO  L87              Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 15 states.
[2020-07-20 13:35:01,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:01,156 INFO  L93              Difference]: Finished difference Result 76 states and 140 transitions.
[2020-07-20 13:35:01,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:35:01,157 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 108
[2020-07-20 13:35:01,158 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:01,159 INFO  L225             Difference]: With dead ends: 76
[2020-07-20 13:35:01,160 INFO  L226             Difference]: Without dead ends: 72
[2020-07-20 13:35:01,163 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:35:01,163 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-07-20 13:35:01,191 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50.
[2020-07-20 13:35:01,194 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-07-20 13:35:01,195 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions.
[2020-07-20 13:35:01,196 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108
[2020-07-20 13:35:01,198 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:01,199 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 75 transitions.
[2020-07-20 13:35:01,199 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 13:35:01,199 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions.
[2020-07-20 13:35:01,205 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 209
[2020-07-20 13:35:01,205 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:01,206 INFO  L422         BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:01,421 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:01,423 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:01,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:01,423 INFO  L82        PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times
[2020-07-20 13:35:01,424 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:01,424 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038758058]
[2020-07-20 13:35:01,424 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:01,522 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:35:01,523 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:01,525 INFO  L263         TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 13:35:01,530 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:01,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked.
[2020-07-20 13:35:01,658 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:02,877 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,232 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,234 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,413 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,415 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,533 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,590 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,591 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:03,649 INFO  L134       CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked.
[2020-07-20 13:35:03,650 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038758058]
[2020-07-20 13:35:03,650 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:03,650 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17
[2020-07-20 13:35:03,650 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899071966]
[2020-07-20 13:35:03,651 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-20 13:35:03,651 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:03,652 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-20 13:35:03,652 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:03,652 INFO  L87              Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 17 states.
[2020-07-20 13:35:03,964 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:03,965 INFO  L93              Difference]: Finished difference Result 81 states and 156 transitions.
[2020-07-20 13:35:03,965 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-07-20 13:35:03,966 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 208
[2020-07-20 13:35:03,967 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:03,968 INFO  L225             Difference]: With dead ends: 81
[2020-07-20 13:35:03,969 INFO  L226             Difference]: Without dead ends: 77
[2020-07-20 13:35:03,969 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506
[2020-07-20 13:35:03,970 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2020-07-20 13:35:03,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55.
[2020-07-20 13:35:03,980 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-07-20 13:35:03,982 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions.
[2020-07-20 13:35:03,982 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208
[2020-07-20 13:35:03,983 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:03,983 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 87 transitions.
[2020-07-20 13:35:03,983 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-20 13:35:03,984 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions.
[2020-07-20 13:35:03,986 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2020-07-20 13:35:03,986 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:03,986 INFO  L422         BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:04,198 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:04,199 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:04,200 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:04,200 INFO  L82        PathProgramCache]: Analyzing trace with hash -1298373331, now seen corresponding path program 2 times
[2020-07-20 13:35:04,200 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:04,201 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819702300]
[2020-07-20 13:35:04,201 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:04,287 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:35:04,287 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:04,289 INFO  L263         TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:35:04,293 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:04,396 INFO  L134       CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 156 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked.
[2020-07-20 13:35:04,397 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:05,062 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,063 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,209 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,210 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,294 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,356 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,357 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,391 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:05,440 INFO  L134       CoverageAnalysis]: Checked inductivity of 543 backedges. 42 proven. 164 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked.
[2020-07-20 13:35:05,440 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819702300]
[2020-07-20 13:35:05,441 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:05,441 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15
[2020-07-20 13:35:05,442 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438317851]
[2020-07-20 13:35:05,443 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 13:35:05,443 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:05,444 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 13:35:05,444 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:35:05,444 INFO  L87              Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 15 states.
[2020-07-20 13:35:05,672 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:05,672 INFO  L93              Difference]: Finished difference Result 99 states and 221 transitions.
[2020-07-20 13:35:05,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:35:05,674 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 148
[2020-07-20 13:35:05,675 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:05,678 INFO  L225             Difference]: With dead ends: 99
[2020-07-20 13:35:05,678 INFO  L226             Difference]: Without dead ends: 95
[2020-07-20 13:35:05,679 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 272 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:35:05,680 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-07-20 13:35:05,699 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57.
[2020-07-20 13:35:05,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2020-07-20 13:35:05,701 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 92 transitions.
[2020-07-20 13:35:05,701 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 92 transitions. Word has length 148
[2020-07-20 13:35:05,702 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:05,702 INFO  L479      AbstractCegarLoop]: Abstraction has 57 states and 92 transitions.
[2020-07-20 13:35:05,702 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 13:35:05,702 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 92 transitions.
[2020-07-20 13:35:05,705 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 124
[2020-07-20 13:35:05,705 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:05,706 INFO  L422         BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:05,918 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:05,919 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:05,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:05,920 INFO  L82        PathProgramCache]: Analyzing trace with hash 2095197631, now seen corresponding path program 1 times
[2020-07-20 13:35:05,920 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:05,921 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037916812]
[2020-07-20 13:35:05,921 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:06,009 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:35:06,009 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:06,010 INFO  L263         TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:35:06,013 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:06,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked.
[2020-07-20 13:35:06,066 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:06,462 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:06,564 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:06,611 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:06,657 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:06,697 INFO  L134       CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 94 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked.
[2020-07-20 13:35:06,698 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037916812]
[2020-07-20 13:35:06,698 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:06,699 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-20 13:35:06,700 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409050478]
[2020-07-20 13:35:06,701 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 13:35:06,701 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:06,701 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 13:35:06,702 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-20 13:35:06,702 INFO  L87              Difference]: Start difference. First operand 57 states and 92 transitions. Second operand 13 states.
[2020-07-20 13:35:06,886 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:06,886 INFO  L93              Difference]: Finished difference Result 99 states and 217 transitions.
[2020-07-20 13:35:06,887 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:35:06,887 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 123
[2020-07-20 13:35:06,888 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:06,889 INFO  L225             Difference]: With dead ends: 99
[2020-07-20 13:35:06,889 INFO  L226             Difference]: Without dead ends: 95
[2020-07-20 13:35:06,890 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 226 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:06,891 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-07-20 13:35:06,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59.
[2020-07-20 13:35:06,899 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2020-07-20 13:35:06,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 98 transitions.
[2020-07-20 13:35:06,901 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 98 transitions. Word has length 123
[2020-07-20 13:35:06,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:06,901 INFO  L479      AbstractCegarLoop]: Abstraction has 59 states and 98 transitions.
[2020-07-20 13:35:06,901 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 13:35:06,901 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 98 transitions.
[2020-07-20 13:35:06,904 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 217
[2020-07-20 13:35:06,904 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:06,904 INFO  L422         BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:07,117 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:07,118 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:07,118 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:07,119 INFO  L82        PathProgramCache]: Analyzing trace with hash 1017418174, now seen corresponding path program 1 times
[2020-07-20 13:35:07,119 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:07,120 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941356413]
[2020-07-20 13:35:07,120 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:07,243 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:35:07,243 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:07,245 INFO  L263         TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 13:35:07,249 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:07,336 INFO  L134       CoverageAnalysis]: Checked inductivity of 1249 backedges. 114 proven. 290 refuted. 0 times theorem prover too weak. 845 trivial. 0 not checked.
[2020-07-20 13:35:07,336 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:08,429 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,431 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,707 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,840 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,841 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,942 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,990 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:08,991 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:09,039 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:09,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 1249 backedges. 116 proven. 304 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked.
[2020-07-20 13:35:09,089 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941356413]
[2020-07-20 13:35:09,089 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:09,090 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17
[2020-07-20 13:35:09,090 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789608177]
[2020-07-20 13:35:09,090 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-20 13:35:09,090 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:09,091 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-20 13:35:09,091 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:09,091 INFO  L87              Difference]: Start difference. First operand 59 states and 98 transitions. Second operand 17 states.
[2020-07-20 13:35:09,449 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:09,450 INFO  L93              Difference]: Finished difference Result 113 states and 271 transitions.
[2020-07-20 13:35:09,450 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-07-20 13:35:09,450 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 216
[2020-07-20 13:35:09,451 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:09,456 INFO  L225             Difference]: With dead ends: 113
[2020-07-20 13:35:09,456 INFO  L226             Difference]: Without dead ends: 67
[2020-07-20 13:35:09,459 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 403 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506
[2020-07-20 13:35:09,462 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2020-07-20 13:35:09,472 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67.
[2020-07-20 13:35:09,472 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-07-20 13:35:09,473 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 104 transitions.
[2020-07-20 13:35:09,475 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 104 transitions. Word has length 216
[2020-07-20 13:35:09,476 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:09,476 INFO  L479      AbstractCegarLoop]: Abstraction has 67 states and 104 transitions.
[2020-07-20 13:35:09,476 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-20 13:35:09,477 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 104 transitions.
[2020-07-20 13:35:09,480 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 136
[2020-07-20 13:35:09,480 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:09,480 INFO  L422         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:09,693 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:09,694 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:09,694 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:09,695 INFO  L82        PathProgramCache]: Analyzing trace with hash -1521837768, now seen corresponding path program 2 times
[2020-07-20 13:35:09,695 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:09,695 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086303669]
[2020-07-20 13:35:09,696 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:09,816 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:35:09,817 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:09,818 INFO  L263         TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:35:09,823 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:09,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 114 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked.
[2020-07-20 13:35:09,894 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:10,512 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,513 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,676 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,773 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,773 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,822 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,823 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,863 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:10,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 430 backedges. 62 proven. 122 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked.
[2020-07-20 13:35:10,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086303669]
[2020-07-20 13:35:10,902 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:10,902 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15
[2020-07-20 13:35:10,902 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127239984]
[2020-07-20 13:35:10,903 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 13:35:10,903 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:10,903 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 13:35:10,904 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:35:10,904 INFO  L87              Difference]: Start difference. First operand 67 states and 104 transitions. Second operand 15 states.
[2020-07-20 13:35:11,139 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:11,139 INFO  L93              Difference]: Finished difference Result 107 states and 201 transitions.
[2020-07-20 13:35:11,140 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:35:11,140 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 135
[2020-07-20 13:35:11,141 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:11,143 INFO  L225             Difference]: With dead ends: 107
[2020-07-20 13:35:11,143 INFO  L226             Difference]: Without dead ends: 100
[2020-07-20 13:35:11,145 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 245 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:35:11,145 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-07-20 13:35:11,153 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 70.
[2020-07-20 13:35:11,154 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-07-20 13:35:11,155 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 112 transitions.
[2020-07-20 13:35:11,156 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 112 transitions. Word has length 135
[2020-07-20 13:35:11,156 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:11,156 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 112 transitions.
[2020-07-20 13:35:11,156 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 13:35:11,156 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 112 transitions.
[2020-07-20 13:35:11,159 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 164
[2020-07-20 13:35:11,159 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:11,160 INFO  L422         BasicCegarLoop]: trace histogram [12, 12, 11, 11, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:11,374 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:11,375 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:11,375 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:11,376 INFO  L82        PathProgramCache]: Analyzing trace with hash 1102424554, now seen corresponding path program 3 times
[2020-07-20 13:35:11,376 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:11,377 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164366565]
[2020-07-20 13:35:11,377 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:11,512 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:11,512 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:11,514 INFO  L263         TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 13:35:11,516 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:11,624 INFO  L134       CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 114 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked.
[2020-07-20 13:35:11,624 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:12,536 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:12,762 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:12,763 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:12,906 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:12,907 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:12,992 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:12,993 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:13,044 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:13,045 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:13,103 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:13,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 657 backedges. 159 proven. 130 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked.
[2020-07-20 13:35:13,175 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164366565]
[2020-07-20 13:35:13,175 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:13,176 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17
[2020-07-20 13:35:13,176 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138494547]
[2020-07-20 13:35:13,177 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-20 13:35:13,177 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:13,177 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-20 13:35:13,177 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:13,178 INFO  L87              Difference]: Start difference. First operand 70 states and 112 transitions. Second operand 17 states.
[2020-07-20 13:35:13,537 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:13,537 INFO  L93              Difference]: Finished difference Result 107 states and 197 transitions.
[2020-07-20 13:35:13,538 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-07-20 13:35:13,538 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 163
[2020-07-20 13:35:13,539 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:13,540 INFO  L225             Difference]: With dead ends: 107
[2020-07-20 13:35:13,540 INFO  L226             Difference]: Without dead ends: 75
[2020-07-20 13:35:13,542 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 297 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506
[2020-07-20 13:35:13,542 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2020-07-20 13:35:13,548 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75.
[2020-07-20 13:35:13,548 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-07-20 13:35:13,550 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 115 transitions.
[2020-07-20 13:35:13,550 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 115 transitions. Word has length 163
[2020-07-20 13:35:13,550 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:13,550 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 115 transitions.
[2020-07-20 13:35:13,550 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-20 13:35:13,551 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 115 transitions.
[2020-07-20 13:35:13,552 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 137
[2020-07-20 13:35:13,553 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:13,553 INFO  L422         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:13,766 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:13,767 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:13,767 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:13,768 INFO  L82        PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 4 times
[2020-07-20 13:35:13,768 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:13,769 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508119364]
[2020-07-20 13:35:13,769 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:13,905 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:13,905 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:13,906 INFO  L263         TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:35:13,909 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:13,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 76 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2020-07-20 13:35:13,967 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:14,384 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:14,472 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:14,472 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:14,525 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:14,581 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:14,649 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked.
[2020-07-20 13:35:14,652 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508119364]
[2020-07-20 13:35:14,656 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:14,656 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-20 13:35:14,656 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330271893]
[2020-07-20 13:35:14,656 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 13:35:14,657 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:14,657 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 13:35:14,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-20 13:35:14,657 INFO  L87              Difference]: Start difference. First operand 75 states and 115 transitions. Second operand 13 states.
[2020-07-20 13:35:14,835 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:14,836 INFO  L93              Difference]: Finished difference Result 107 states and 179 transitions.
[2020-07-20 13:35:14,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:35:14,839 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 136
[2020-07-20 13:35:14,839 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:14,841 INFO  L225             Difference]: With dead ends: 107
[2020-07-20 13:35:14,841 INFO  L226             Difference]: Without dead ends: 100
[2020-07-20 13:35:14,842 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:14,842 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-07-20 13:35:14,853 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82.
[2020-07-20 13:35:14,854 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2020-07-20 13:35:14,856 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 136 transitions.
[2020-07-20 13:35:14,856 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states and 136 transitions. Word has length 136
[2020-07-20 13:35:14,856 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:14,857 INFO  L479      AbstractCegarLoop]: Abstraction has 82 states and 136 transitions.
[2020-07-20 13:35:14,857 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 13:35:14,857 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states and 136 transitions.
[2020-07-20 13:35:14,859 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 149
[2020-07-20 13:35:14,860 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:14,860 INFO  L422         BasicCegarLoop]: trace histogram [11, 11, 10, 10, 8, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:15,061 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:15,062 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:15,062 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:15,063 INFO  L82        PathProgramCache]: Analyzing trace with hash -1316077641, now seen corresponding path program 5 times
[2020-07-20 13:35:15,063 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:15,063 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698700156]
[2020-07-20 13:35:15,064 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:15,222 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:15,223 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:15,224 INFO  L263         TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:35:15,226 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:15,300 INFO  L134       CoverageAnalysis]: Checked inductivity of 529 backedges. 106 proven. 98 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked.
[2020-07-20 13:35:15,301 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:15,975 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:16,112 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:16,113 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:16,205 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:16,259 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:16,314 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:16,378 INFO  L134       CoverageAnalysis]: Checked inductivity of 529 backedges. 108 proven. 104 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked.
[2020-07-20 13:35:16,379 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698700156]
[2020-07-20 13:35:16,379 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:16,379 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15
[2020-07-20 13:35:16,379 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835370676]
[2020-07-20 13:35:16,382 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 13:35:16,382 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:16,382 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 13:35:16,383 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:35:16,383 INFO  L87              Difference]: Start difference. First operand 82 states and 136 transitions. Second operand 15 states.
[2020-07-20 13:35:16,616 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:16,616 INFO  L93              Difference]: Finished difference Result 117 states and 203 transitions.
[2020-07-20 13:35:16,616 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:35:16,617 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 148
[2020-07-20 13:35:16,617 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:16,618 INFO  L225             Difference]: With dead ends: 117
[2020-07-20 13:35:16,619 INFO  L226             Difference]: Without dead ends: 110
[2020-07-20 13:35:16,620 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 271 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:35:16,620 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-07-20 13:35:16,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80.
[2020-07-20 13:35:16,630 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-07-20 13:35:16,631 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions.
[2020-07-20 13:35:16,632 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 148
[2020-07-20 13:35:16,632 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:16,633 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 128 transitions.
[2020-07-20 13:35:16,633 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 13:35:16,633 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions.
[2020-07-20 13:35:16,636 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 150
[2020-07-20 13:35:16,636 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:16,636 INFO  L422         BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:16,851 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:16,852 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:16,852 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:16,853 INFO  L82        PathProgramCache]: Analyzing trace with hash -872965087, now seen corresponding path program 6 times
[2020-07-20 13:35:16,853 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:16,853 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467708353]
[2020-07-20 13:35:16,854 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:17,014 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:17,015 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:17,016 INFO  L263         TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:35:17,018 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:17,079 INFO  L134       CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 81 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked.
[2020-07-20 13:35:17,080 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:17,542 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,543 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,625 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,672 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,672 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,705 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,745 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:17,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 537 backedges. 88 proven. 85 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked.
[2020-07-20 13:35:17,813 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467708353]
[2020-07-20 13:35:17,813 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:17,813 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-20 13:35:17,813 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205460829]
[2020-07-20 13:35:17,814 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 13:35:17,814 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:17,814 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 13:35:17,814 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-20 13:35:17,814 INFO  L87              Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states.
[2020-07-20 13:35:17,984 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:17,984 INFO  L93              Difference]: Finished difference Result 114 states and 190 transitions.
[2020-07-20 13:35:17,985 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:35:17,985 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 149
[2020-07-20 13:35:17,985 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:17,987 INFO  L225             Difference]: With dead ends: 114
[2020-07-20 13:35:17,987 INFO  L226             Difference]: Without dead ends: 107
[2020-07-20 13:35:17,988 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 277 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:17,988 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2020-07-20 13:35:17,996 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80.
[2020-07-20 13:35:17,997 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-07-20 13:35:17,998 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 128 transitions.
[2020-07-20 13:35:17,998 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 128 transitions. Word has length 149
[2020-07-20 13:35:17,998 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:17,999 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 128 transitions.
[2020-07-20 13:35:17,999 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 13:35:17,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 128 transitions.
[2020-07-20 13:35:18,000 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 151
[2020-07-20 13:35:18,001 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:18,001 INFO  L422         BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:18,209 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:18,209 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:18,209 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:18,210 INFO  L82        PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 7 times
[2020-07-20 13:35:18,210 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:18,210 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894328367]
[2020-07-20 13:35:18,211 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:18,359 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:18,359 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:18,360 INFO  L263         TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:35:18,363 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:18,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked.
[2020-07-20 13:35:18,415 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:18,907 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:18,990 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:19,042 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:19,043 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:19,118 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:19,242 INFO  L134       CoverageAnalysis]: Checked inductivity of 544 backedges. 143 proven. 37 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked.
[2020-07-20 13:35:19,243 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894328367]
[2020-07-20 13:35:19,243 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:19,243 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-20 13:35:19,243 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778554153]
[2020-07-20 13:35:19,244 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 13:35:19,244 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:19,244 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 13:35:19,245 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-20 13:35:19,245 INFO  L87              Difference]: Start difference. First operand 80 states and 128 transitions. Second operand 13 states.
[2020-07-20 13:35:19,404 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:19,404 INFO  L93              Difference]: Finished difference Result 106 states and 183 transitions.
[2020-07-20 13:35:19,404 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:35:19,404 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 150
[2020-07-20 13:35:19,405 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:19,406 INFO  L225             Difference]: With dead ends: 106
[2020-07-20 13:35:19,406 INFO  L226             Difference]: Without dead ends: 99
[2020-07-20 13:35:19,407 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:19,407 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-07-20 13:35:19,417 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92.
[2020-07-20 13:35:19,418 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 92 states.
[2020-07-20 13:35:19,419 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 161 transitions.
[2020-07-20 13:35:19,419 INFO  L78                 Accepts]: Start accepts. Automaton has 92 states and 161 transitions. Word has length 150
[2020-07-20 13:35:19,420 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:19,420 INFO  L479      AbstractCegarLoop]: Abstraction has 92 states and 161 transitions.
[2020-07-20 13:35:19,420 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 13:35:19,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 92 states and 161 transitions.
[2020-07-20 13:35:19,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 163
[2020-07-20 13:35:19,422 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:19,423 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 10, 10, 9, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:19,637 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:19,638 INFO  L427      AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:19,639 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:19,639 INFO  L82        PathProgramCache]: Analyzing trace with hash 1102006884, now seen corresponding path program 8 times
[2020-07-20 13:35:19,640 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:19,640 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378577461]
[2020-07-20 13:35:19,640 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:19,796 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:19,796 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:19,798 INFO  L263         TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:35:19,801 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:19,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 656 backedges. 185 proven. 49 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked.
[2020-07-20 13:35:19,894 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:20,437 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,438 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,607 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,696 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,743 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,744 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,818 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:20,980 INFO  L134       CoverageAnalysis]: Checked inductivity of 656 backedges. 187 proven. 55 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked.
[2020-07-20 13:35:20,981 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378577461]
[2020-07-20 13:35:20,981 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:20,981 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15
[2020-07-20 13:35:20,981 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48639921]
[2020-07-20 13:35:20,982 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 13:35:20,982 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:20,982 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 13:35:20,982 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:35:20,983 INFO  L87              Difference]: Start difference. First operand 92 states and 161 transitions. Second operand 15 states.
[2020-07-20 13:35:21,200 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:21,200 INFO  L93              Difference]: Finished difference Result 117 states and 207 transitions.
[2020-07-20 13:35:21,205 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:35:21,206 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 162
[2020-07-20 13:35:21,206 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:21,208 INFO  L225             Difference]: With dead ends: 117
[2020-07-20 13:35:21,208 INFO  L226             Difference]: Without dead ends: 110
[2020-07-20 13:35:21,209 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 299 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:35:21,209 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-07-20 13:35:21,217 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96.
[2020-07-20 13:35:21,217 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 96 states.
[2020-07-20 13:35:21,218 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 158 transitions.
[2020-07-20 13:35:21,219 INFO  L78                 Accepts]: Start accepts. Automaton has 96 states and 158 transitions. Word has length 162
[2020-07-20 13:35:21,219 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:21,219 INFO  L479      AbstractCegarLoop]: Abstraction has 96 states and 158 transitions.
[2020-07-20 13:35:21,219 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 13:35:21,220 INFO  L276                IsEmpty]: Start isEmpty. Operand 96 states and 158 transitions.
[2020-07-20 13:35:21,222 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 164
[2020-07-20 13:35:21,222 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:21,222 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:21,437 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:21,438 INFO  L427      AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:21,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:21,439 INFO  L82        PathProgramCache]: Analyzing trace with hash 1920867700, now seen corresponding path program 9 times
[2020-07-20 13:35:21,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:21,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724919612]
[2020-07-20 13:35:21,440 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:21,603 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:21,604 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:21,605 INFO  L263         TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:35:21,609 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:21,680 INFO  L134       CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 37 refuted. 0 times theorem prover too weak. 479 trivial. 0 not checked.
[2020-07-20 13:35:21,681 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:22,069 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,070 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,163 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,204 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,205 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,241 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,298 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:22,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 665 backedges. 149 proven. 43 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked.
[2020-07-20 13:35:22,463 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724919612]
[2020-07-20 13:35:22,463 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:22,463 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-20 13:35:22,463 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387026428]
[2020-07-20 13:35:22,465 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 13:35:22,465 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:22,465 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 13:35:22,465 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-20 13:35:22,465 INFO  L87              Difference]: Start difference. First operand 96 states and 158 transitions. Second operand 13 states.
[2020-07-20 13:35:22,637 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:22,637 INFO  L93              Difference]: Finished difference Result 129 states and 217 transitions.
[2020-07-20 13:35:22,640 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:35:22,641 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 163
[2020-07-20 13:35:22,641 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:22,643 INFO  L225             Difference]: With dead ends: 129
[2020-07-20 13:35:22,643 INFO  L226             Difference]: Without dead ends: 122
[2020-07-20 13:35:22,644 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 305 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:22,645 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-07-20 13:35:22,652 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93.
[2020-07-20 13:35:22,653 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-07-20 13:35:22,654 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions.
[2020-07-20 13:35:22,654 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 163
[2020-07-20 13:35:22,655 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:22,655 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 149 transitions.
[2020-07-20 13:35:22,655 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 13:35:22,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions.
[2020-07-20 13:35:22,657 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 165
[2020-07-20 13:35:22,658 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:22,658 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 10, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:22,870 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:22,871 INFO  L427      AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:22,871 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:22,871 INFO  L82        PathProgramCache]: Analyzing trace with hash -1607241826, now seen corresponding path program 10 times
[2020-07-20 13:35:22,872 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:22,872 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115105555]
[2020-07-20 13:35:22,872 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:23,047 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:23,048 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:23,049 INFO  L263         TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 13:35:23,052 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:23,105 INFO  L134       CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 32 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked.
[2020-07-20 13:35:23,105 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:23,368 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:23,412 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:23,450 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:23,515 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:23,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 673 backedges. 123 proven. 34 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked.
[2020-07-20 13:35:23,651 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115105555]
[2020-07-20 13:35:23,651 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:23,651 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11
[2020-07-20 13:35:23,651 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246355047]
[2020-07-20 13:35:23,652 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-20 13:35:23,652 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:23,652 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-20 13:35:23,652 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2020-07-20 13:35:23,652 INFO  L87              Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 11 states.
[2020-07-20 13:35:23,788 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:23,788 INFO  L93              Difference]: Finished difference Result 131 states and 225 transitions.
[2020-07-20 13:35:23,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 13:35:23,789 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 164
[2020-07-20 13:35:23,790 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:23,792 INFO  L225             Difference]: With dead ends: 131
[2020-07-20 13:35:23,792 INFO  L226             Difference]: Without dead ends: 124
[2020-07-20 13:35:23,793 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 311 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182
[2020-07-20 13:35:23,794 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2020-07-20 13:35:23,801 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95.
[2020-07-20 13:35:23,801 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 95 states.
[2020-07-20 13:35:23,802 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions.
[2020-07-20 13:35:23,802 INFO  L78                 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 164
[2020-07-20 13:35:23,803 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:23,803 INFO  L479      AbstractCegarLoop]: Abstraction has 95 states and 157 transitions.
[2020-07-20 13:35:23,803 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-20 13:35:23,803 INFO  L276                IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions.
[2020-07-20 13:35:23,805 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 177
[2020-07-20 13:35:23,805 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:23,805 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:24,018 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:24,019 INFO  L427      AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:24,020 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:24,020 INFO  L82        PathProgramCache]: Analyzing trace with hash -315995755, now seen corresponding path program 11 times
[2020-07-20 13:35:24,020 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:24,020 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735241884]
[2020-07-20 13:35:24,021 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:24,221 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:24,221 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:24,223 INFO  L263         TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 13:35:24,226 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:24,337 INFO  L134       CoverageAnalysis]: Checked inductivity of 777 backedges. 168 proven. 41 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked.
[2020-07-20 13:35:24,338 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:24,735 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:24,819 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:24,869 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:24,918 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:24,985 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:25,132 INFO  L134       CoverageAnalysis]: Checked inductivity of 777 backedges. 170 proven. 43 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked.
[2020-07-20 13:35:25,133 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735241884]
[2020-07-20 13:35:25,133 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:25,133 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-20 13:35:25,133 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654007695]
[2020-07-20 13:35:25,134 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 13:35:25,134 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:25,135 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 13:35:25,135 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-20 13:35:25,136 INFO  L87              Difference]: Start difference. First operand 95 states and 157 transitions. Second operand 13 states.
[2020-07-20 13:35:25,304 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:25,304 INFO  L93              Difference]: Finished difference Result 110 states and 175 transitions.
[2020-07-20 13:35:25,305 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 13:35:25,305 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 176
[2020-07-20 13:35:25,306 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:25,307 INFO  L225             Difference]: With dead ends: 110
[2020-07-20 13:35:25,307 INFO  L226             Difference]: Without dead ends: 103
[2020-07-20 13:35:25,308 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 331 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:25,308 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2020-07-20 13:35:25,316 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93.
[2020-07-20 13:35:25,316 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-07-20 13:35:25,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 149 transitions.
[2020-07-20 13:35:25,318 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 149 transitions. Word has length 176
[2020-07-20 13:35:25,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:25,318 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 149 transitions.
[2020-07-20 13:35:25,318 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 13:35:25,318 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 149 transitions.
[2020-07-20 13:35:25,321 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 192
[2020-07-20 13:35:25,321 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:25,322 INFO  L422         BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:25,535 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:25,536 INFO  L427      AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:25,536 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:25,537 INFO  L82        PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 12 times
[2020-07-20 13:35:25,537 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:25,537 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624994034]
[2020-07-20 13:35:25,537 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:25,723 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:25,723 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:25,725 INFO  L263         TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-07-20 13:35:25,728 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:25,813 INFO  L134       CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 45 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked.
[2020-07-20 13:35:25,813 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:26,486 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:26,627 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:26,715 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:26,765 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:26,809 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:26,876 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:27,025 INFO  L134       CoverageAnalysis]: Checked inductivity of 938 backedges. 251 proven. 55 refuted. 0 times theorem prover too weak. 632 trivial. 0 not checked.
[2020-07-20 13:35:27,025 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624994034]
[2020-07-20 13:35:27,026 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:27,026 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15
[2020-07-20 13:35:27,026 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530078423]
[2020-07-20 13:35:27,026 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 13:35:27,026 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:27,027 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 13:35:27,027 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-07-20 13:35:27,027 INFO  L87              Difference]: Start difference. First operand 93 states and 149 transitions. Second operand 15 states.
[2020-07-20 13:35:27,231 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:27,232 INFO  L93              Difference]: Finished difference Result 123 states and 202 transitions.
[2020-07-20 13:35:27,233 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-07-20 13:35:27,234 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 191
[2020-07-20 13:35:27,234 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:27,235 INFO  L225             Difference]: With dead ends: 123
[2020-07-20 13:35:27,236 INFO  L226             Difference]: Without dead ends: 116
[2020-07-20 13:35:27,237 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 357 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:35:27,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2020-07-20 13:35:27,252 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101.
[2020-07-20 13:35:27,252 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 101 states.
[2020-07-20 13:35:27,254 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 173 transitions.
[2020-07-20 13:35:27,254 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 173 transitions. Word has length 191
[2020-07-20 13:35:27,254 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:27,254 INFO  L479      AbstractCegarLoop]: Abstraction has 101 states and 173 transitions.
[2020-07-20 13:35:27,255 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 13:35:27,255 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 173 transitions.
[2020-07-20 13:35:27,257 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 205
[2020-07-20 13:35:27,257 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:27,258 INFO  L422         BasicCegarLoop]: trace histogram [15, 15, 14, 14, 12, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:27,470 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:27,471 INFO  L427      AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:27,471 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:27,472 INFO  L82        PathProgramCache]: Analyzing trace with hash -31808317, now seen corresponding path program 13 times
[2020-07-20 13:35:27,472 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:27,472 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665409129]
[2020-07-20 13:35:27,473 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:27,667 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:27,667 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:35:27,669 INFO  L263         TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 13:35:27,672 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:35:27,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked.
[2020-07-20 13:35:27,768 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:35:28,687 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:28,688 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:28,942 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:28,943 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,102 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,103 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,190 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,191 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,244 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,245 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,322 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 13:35:29,459 INFO  L134       CoverageAnalysis]: Checked inductivity of 1073 backedges. 270 proven. 116 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked.
[2020-07-20 13:35:29,460 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665409129]
[2020-07-20 13:35:29,460 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:35:29,460 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17
[2020-07-20 13:35:29,460 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183110068]
[2020-07-20 13:35:29,461 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-20 13:35:29,461 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:35:29,461 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-20 13:35:29,461 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2020-07-20 13:35:29,462 INFO  L87              Difference]: Start difference. First operand 101 states and 173 transitions. Second operand 17 states.
[2020-07-20 13:35:29,757 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:35:29,758 INFO  L93              Difference]: Finished difference Result 121 states and 205 transitions.
[2020-07-20 13:35:29,758 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-07-20 13:35:29,758 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 204
[2020-07-20 13:35:29,759 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:35:29,761 INFO  L225             Difference]: With dead ends: 121
[2020-07-20 13:35:29,761 INFO  L226             Difference]: Without dead ends: 114
[2020-07-20 13:35:29,762 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506
[2020-07-20 13:35:29,763 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2020-07-20 13:35:29,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 93.
[2020-07-20 13:35:29,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 93 states.
[2020-07-20 13:35:29,771 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 161 transitions.
[2020-07-20 13:35:29,771 INFO  L78                 Accepts]: Start accepts. Automaton has 93 states and 161 transitions. Word has length 204
[2020-07-20 13:35:29,772 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:35:29,772 INFO  L479      AbstractCegarLoop]: Abstraction has 93 states and 161 transitions.
[2020-07-20 13:35:29,772 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-20 13:35:29,772 INFO  L276                IsEmpty]: Start isEmpty. Operand 93 states and 161 transitions.
[2020-07-20 13:35:29,774 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2020-07-20 13:35:29,774 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:35:29,775 INFO  L422         BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:35:29,989 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:29,990 INFO  L427      AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:35:29,990 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:35:29,991 INFO  L82        PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 14 times
[2020-07-20 13:35:29,991 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:35:29,991 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775567939]
[2020-07-20 13:35:29,992 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:30,189 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:35:30,190 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 13:35:30,190 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:35:30,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 13:35:30,225 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:35:30,261 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 13:35:30,261 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 13:35:30,474 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:35:30,529 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:35:30 BoogieIcfgContainer
[2020-07-20 13:35:30,529 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 13:35:30,531 INFO  L168              Benchmark]: Toolchain (without parser) took 41271.40 ms. Allocated memory was 144.7 MB in the beginning and 551.6 MB in the end (delta: 406.8 MB). Free memory was 102.5 MB in the beginning and 151.1 MB in the end (delta: -48.6 MB). Peak memory consumption was 358.3 MB. Max. memory is 7.1 GB.
[2020-07-20 13:35:30,532 INFO  L168              Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-20 13:35:30,532 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 405.97 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-07-20 13:35:30,533 INFO  L168              Benchmark]: Boogie Preprocessor took 185.26 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 92.5 MB in the beginning and 181.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
[2020-07-20 13:35:30,533 INFO  L168              Benchmark]: RCFGBuilder took 397.82 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 168.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
[2020-07-20 13:35:30,533 INFO  L168              Benchmark]: TraceAbstraction took 40266.63 ms. Allocated memory was 202.9 MB in the beginning and 551.6 MB in the end (delta: 348.7 MB). Free memory was 168.0 MB in the beginning and 151.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 365.5 MB. Max. memory is 7.1 GB.
[2020-07-20 13:35:30,535 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.42 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 405.97 ms. Allocated memory is still 144.7 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 185.26 ms. Allocated memory was 144.7 MB in the beginning and 202.9 MB in the end (delta: 58.2 MB). Free memory was 92.5 MB in the beginning and 181.4 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 397.82 ms. Allocated memory is still 202.9 MB. Free memory was 181.4 MB in the beginning and 168.7 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 40266.63 ms. Allocated memory was 202.9 MB in the beginning and 551.6 MB in the end (delta: 348.7 MB). Free memory was 168.0 MB in the beginning and 151.1 MB in the end (delta: 16.9 MB). Peak memory consumption was 365.5 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L36]              int x = 6;
       VAL         [x=6]
[L37]  CALL, EXPR  fibo1(x)
       VAL         [\old(n)=6]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=6, n=6]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=6, n=6]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=5]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=5, n=5]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=5, n=5]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=4]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=4, n=4]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=4, n=4]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=3]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=3, n=3]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=3, n=3]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=2]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=2, fibo2(n-1)=1, n=2]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=0]
[L18]  COND TRUE   n < 1
[L19]              return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=3, fibo1(n-1)=1, n=3]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=1]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L10]  COND TRUE   n == 1
[L11]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=4, fibo2(n-1)=2, n=4]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=2]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=1]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L10]  COND TRUE   n == 1
[L11]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=2, fibo1(n-1)=1, n=2]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=0]
[L8]   COND TRUE   n < 1
[L9]               return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=5, fibo1(n-1)=3, n=5]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=3]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=3, n=3]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=3, n=3]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=2]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=1]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L10]  COND TRUE   n == 1
[L11]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=2, fibo1(n-1)=1, n=2]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=0]
[L8]   COND TRUE   n < 1
[L9]               return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=3, fibo2(n-1)=1, n=3]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=6, fibo2(n-1)=5, n=6]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=4]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=4, n=4]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=4, n=4]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=3]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=3, n=3]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=3, n=3]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=2]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=1]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L10]  COND TRUE   n == 1
[L11]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=2, fibo1(n-1)=1, n=2]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=0]
[L8]   COND TRUE   n < 1
[L9]               return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=3, fibo2(n-1)=1, n=3]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=4, fibo1(n-1)=2, n=4]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=2]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=2, fibo2(n-1)=1, n=2]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=0]
[L18]  COND TRUE   n < 1
[L19]              return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L37]  RET, EXPR   fibo1(x)
       VAL         [fibo1(x)=8, x=6]
[L37]              int result = fibo1(x);
[L38]  COND TRUE   result == 8
       VAL         [result=8, x=6]
[L39]              __VERIFIER_error()
       VAL         [result=8, x=6]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 40.0s, OverallIterations: 27, TraceHistogramMax: 18, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 635 SDtfs, 1042 SDslu, 3546 SDs, 0 SdLazy, 3602 SolverSat, 849 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6247 GetRequests, 5623 SyntacticMatches, 225 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 424 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 24.3s InterpolantComputationTime, 3264 NumberOfCodeBlocks, 2955 NumberOfCodeBlocksAsserted, 93 NumberOfCheckSat, 6097 ConstructedInterpolants, 0 QuantifiedInterpolants, 1531967 SizeOfPredicates, 132 NumberOfNonLiveVariables, 6411 ConjunctsInSsa, 264 ConjunctsInUnsatCore, 50 InterpolantComputations, 2 PerfectInterpolantSequences, 19515/23532 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...